From:	"Matthias Paul" <PAUL-MA AT reze-1 DOT rz DOT rwth-aachen DOT de>
Organization:	Rechenzentrum RWTH Aachen
To:	opendos AT delorie DOT com
Date:	Mon, 30 Oct 2000 17:23:46 +0100
Subject:	RE: Causeway DOS extender and DR-DOS EMM386
X-mailer:	Pegasus Mail v3.22
Message-ID:	<5F1D5895E8E@reze-1.rz.rwth-aachen.de>
Reply-To:	opendos AT delorie DOT com

On Mon, 30 Oct 2000 Joe Da Silva wrote:

> Yes, there is a problem with Scitech Display Doctor and DR-EMM386 (7),
> which you can fix by re-stubbing the Causeway DOS-extender of the
> Scitech utilities (these utilities currently use an old version of
> Causeway).

One more thing to try is to set EMM386 PIC=ON. 

At least for the Symbios/LSI tools (SYMCONF/SYMDIAG/ASPIFMT/INSTALL) 
this significantly changes the behaviour and keeps them from crashing 
(however they still don't run due to other issues). 

The Causeway DOS extender can be forced to use DPMI instead of
VCPI (by default it uses VCPI even when DPMI is available).

Set the environment variable CAUSEWAY=DPMI prior to loading the
application. This also helps alot and removes the effect that 
these tools are crashing on exit. Again, it does not fix all 
problems for the SCSI tools, but it's worth to give it a try, 
as other applications may work fine after the change. 
I tried this with EMM386 /DPMI and with CWSDPMI r4 under 
single- and multitasking DR-DOS 7.03. The results were different,
but in any case fixed at least some problems. The actual problem 
appears to be down to the handling of hardware interrupts under
EMM386.

If you have other applications using the Causeway DOS extender,
I would appreaciate your feedback on this issue. 

 Matthias
 
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Matthias Paul, Ubierstrasse 28, D-50321 Bruehl, Germany
eMail: <Matthias DOT Paul AT post DOT rwth-aachen DOT de>
Web  : http://www.rhrz.uni-bonn.de/~uzs180/mpdokeng.html
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